Investigating the effect of rGO on microstructural and electrical properties of La0.9Sr0.1Ga0.8Mg0.2O3 in intermediate temperature SOFCs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10251017" target="_blank" >RIV/61989100:27710/22:10251017 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2022/se/d2se00746k" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2022/se/d2se00746k</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d2se00746k" target="_blank" >10.1039/d2se00746k</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigating the effect of rGO on microstructural and electrical properties of La0.9Sr0.1Ga0.8Mg0.2O3 in intermediate temperature SOFCs

Popis výsledku v původním jazyce

Despite the high demand for green energy sources, the low performance of solid oxide fuel cells (SOFCs) at low temperatures hinders their potential practical application. Ceramic reduced graphene oxide (rGO) composites are promising candidates as solid electrolytes for SOFCs enabling efficient heat transfer and effective ionic charge carrier transport. In the present work, x%rGO + LSGM (x = 0, 0.25, 1, and 2 wt%) composites were fabricated using the sol-gel method, and a thorough characterization of the materials&apos; properties was conducted including structural and electrical properties for their possible use in SOFC applications. XRD was used to investigate the structural properties of x%rGO + LSGM composite precursors. All the XRD patterns corresponding to the LSGM based precursor peaks showed a single phase structure without any impurities. To identify the signal from rGO in the samples manufactured from composite powders, Raman spectra were obtained at different points by using various wavelengths. The microstructure of 2%rGO + LSGM shows TILDE OPERATOR+D9196.1% relative density and a grain size of TILDE OPERATOR+D911.86 μm when annealed at 1300 oC for 5 h in air. The temperature dependencies of grain and ionic conductivities of the rGO + LSGM composite precursors were revealed for the first time. Temperature dependence of the ionic conductivity of 2%rGO + LSGM at 750 oC is about 0.051 S cmMINUS SIGN 1 whereas the grain conductivity of 1%rGO + LSGM is half of the grain conductivity of 2%rGO + LSGM at 550 oC. The activation energy of 0.25-2% rGO with the addition of sintering aids at T &gt; 400 oC is 0.85 eV, 0.81 eV, and 0.86 eV, respectively, leading to efficient ionic conduction at intermediate temperature. (C) 2022 The Royal Society of Chemistry.

Název v anglickém jazyce

Investigating the effect of rGO on microstructural and electrical properties of La0.9Sr0.1Ga0.8Mg0.2O3 in intermediate temperature SOFCs

Popis výsledku anglicky

Despite the high demand for green energy sources, the low performance of solid oxide fuel cells (SOFCs) at low temperatures hinders their potential practical application. Ceramic reduced graphene oxide (rGO) composites are promising candidates as solid electrolytes for SOFCs enabling efficient heat transfer and effective ionic charge carrier transport. In the present work, x%rGO + LSGM (x = 0, 0.25, 1, and 2 wt%) composites were fabricated using the sol-gel method, and a thorough characterization of the materials&apos; properties was conducted including structural and electrical properties for their possible use in SOFC applications. XRD was used to investigate the structural properties of x%rGO + LSGM composite precursors. All the XRD patterns corresponding to the LSGM based precursor peaks showed a single phase structure without any impurities. To identify the signal from rGO in the samples manufactured from composite powders, Raman spectra were obtained at different points by using various wavelengths. The microstructure of 2%rGO + LSGM shows TILDE OPERATOR+D9196.1% relative density and a grain size of TILDE OPERATOR+D911.86 μm when annealed at 1300 oC for 5 h in air. The temperature dependencies of grain and ionic conductivities of the rGO + LSGM composite precursors were revealed for the first time. Temperature dependence of the ionic conductivity of 2%rGO + LSGM at 750 oC is about 0.051 S cmMINUS SIGN 1 whereas the grain conductivity of 1%rGO + LSGM is half of the grain conductivity of 2%rGO + LSGM at 550 oC. The activation energy of 0.25-2% rGO with the addition of sintering aids at T &gt; 400 oC is 0.85 eV, 0.81 eV, and 0.86 eV, respectively, leading to efficient ionic conduction at intermediate temperature. (C) 2022 The Royal Society of Chemistry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sustainable Energy &amp; Fuels

ISSN

2398-4902

e-ISSN

2398-4902

Svazek periodika

2022

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

"3465–3476"

Kód UT WoS článku

000816700800002

EID výsledku v databázi Scopus

2-s2.0-85133126747